instead of or in addition to synthetic foods you can go the traditional route, fig newtons, oranges, apples, and bananas...
Bonk is low blood sugar. Depletion of glycogen.
My SO can bonk w/o any real warning. She might wobble a bit when she usually holds quite the line. Then she crashes...
I live low carb, and it can be quite easy for me to deplete what little stores I have. Oh, I'm low carb / persistently depleted on purpose. I was insulin resistant/pre-diabetic... and beat it... But I think I need to ensure I stay this way.
http://sportsmedicine.about.com/od/E...g-The-Wall.htm
Look up the symptoms. if they match... Bonking can be dangerous. I jumped a light in front of a left turning school bus. Could have been ugly.
If you are bonking, please consider you're diabetes/insulin resistance / metabolic syndrome status.